Set Capistrano task for deployment only, not for deployment: cold

I am using craken to run cron processes on my aws machine instance. I have defined the following custom tasks in Capistrano:

namespace :craken do
  desc "Install raketab"
  task :install, :roles => :cron do
    set :rails_env, "production" unless exists?(:rails_env)
    set :env_args, (exists?(:env_args) ? env_args : "app_name=#{application} deploy_path=#{current_path}")
    run "cd #{current_path} && rake #{env_args} RAILS_ENV=#{rails_env} craken:install"
  end
  task :uninstall, :roles => :cron do
    set :rails_env, "production" unless exists?(:rails_env)
    set :env_args, (exists?(:env_args) ? env_args : "app_name=#{application} deploy_path=#{current_path}")
    run "cd #{current_path} && rake #{env_args} RAILS_ENV=#{rails_env} craken:uninstall"
  end
end

before "deploy:symlink", "craken:uninstall"
after "deploy:symlink", "craken:install"

      

        
        
        
      

    

The problem is that, before "deploy: symlink", "craken: uninstall" the reasons for the deployment: cold crash on first launch as craken raketab is still not installed. How can I configure this to run only if it is deploying rather than deploying: cold? Is there an environment variable I can check?

Thanks!